Here is a list of all files with brief descriptions:

arm_attributes.h	ARM common compilers attributes
arm_chip_ino.h	Common macros for Arduino
arm_chip_pic.h	Common macros for PIC
arm_chip_sam.h	ARM common macros for Atmel SAM families
arm_chip_stm32.h	ARM common macros for STM32
arm_cmsis.h	ARM link with CMSIS files
arm_errors.h	ARM user errors
arm_hal_peripheral.h	ARM HAL peripheral includes
arm_inlines.h	ARM common inlines
arm_inlines_angle.h	Angle conversion inlines
arm_inlines_ascii.h	ASCII code conversion inlines
arm_inlines_average.h	Averaging inlines
arm_inlines_bcd.h	BCD code conversion inlines
arm_inlines_binary.h	Binary manipulation inlines
arm_inlines_endian.h	Endian conversion and testing inlines
arm_inlines_float.h	Floating point manipulation inlines
arm_inlines_gray.h	Gray code conversion inlines
arm_inlines_linearization.h	Linearization inlines
arm_inlines_rotation.h	Rotation inlines
arm_inlines_stdclib.h	ARM common standard c library inlines and wrapper macros
arm_inlines_temperature.h	Temperature conversion inlines
arm_inlines_ticks.h	Ticks related inlines
arm_inlines_var_size.h	Variables size conversion inlines
arm_inlines_var_test.h	Variables test inlines
arm_keywords.h	Common keywords aliases
arm_macros.h	ARM common macros
arm_preprocess.h	ARM common pre-processing macros and directives
arm_typedefs.h	ARM common typedefs
sarmfsw.c	Sarmfsw include (for code checkers triggering purpose)
sarmfsw.h	Sarmfsw (ARM) common headers
sarmfsw_version.h	Sarmfsw version headers